Loan and Security Agreement - Additional Information (Detail) - USD ($)	1 Months Ended	3 Months Ended
Aug. 31, 2020	Mar. 31, 2021
Loan and Security Agreement [Member]
Debt Instrument [Line Items]
Revolving line of credit outstanding amount		$ 0
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Credit facility borrowing capacity		25,000,000.0
Revolving Credit Facility [Member] \| Loan and Security Agreement [Member] \| 2020 Loan Agreement [Member]
Debt Instrument [Line Items]
Credit facility borrowing capacity		$ 25,000,000.0
Maximum percentage borrowings of eligible accounts receivable		80.00%
Debt instrument, interest rate description	bear interest at the greater of 3.25% or the prime rate
Debt instrument interest rate during period minimum stated percentage		3.25%
Debt Instrument, Covenant Description	the Company is required to maintain a financial performance covenant: a minimum asset coverage ratio of 1.5 to 1, calculated as the sum of unrestricted cash and qualified accounts receivable divided by borrowings outstanding under the revolving line of credit. As of March 31, 2021, the Company was in compliance with these covenants. Events which would meet the criteria of a default under the 2020 Loan Agreement include failure to make payments when due, insolvency events, failure to comply with covenants or material adverse events with respect to the Company.
Maturity date	2022-08

Minimum contractual interest rate for funds borrowed, under the debt agreement.

No definition available.

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Namespace Prefix:	ever_
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Period Type:	duration

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM format.

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

The maximum amount of borrowing allowed under the terms of the line of credit, as a percentage of eligible accounts receivable.

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Description of minimum financial levels (for example, tangible net worth and working capital) and achievement of certain financial ratios (for example, working capital ratio and debt service coverage ratio), and adherence to certain clauses which generally require or restrict certain actions (for example, entering into a debt arrangement with equal or greater seniority, and selling or discontinuing a certain business segment or material subsidiary) to be in compliance with the covenant clauses of the debt agreement. May also include a discussion of the adverse consequences that would result if the entity violates or fails to satisfy the covenants.

+ References

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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+ Details

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Namespace Prefix:	us-gaap_
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- Details

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- Details

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